Speed governor



S. M. KINTN ER- SPEED GOVERNOR. APPLICATION FILED NOV 19, I919.

1,409,553, Patented Mar. 14, 1922.

2 SHEETS-SHEET I.

UNITE 5 TIONAL DEVICES COMPANY, A

conronarron or DELAWARE.

srnnn eovnaivon. V

mosses.

Specification of ietters latent. P t n Mar. 4 1 2 Application filedNovember 19,1919. Se1'ia1"No.' 339,043."

To all whom it may concern.

Be it known that I, SAMUEL M. KINTNER, a resident of Pittsburgh, in thecountyof Allegheny and State of Pennsylvania, have invented a new anduseful Improvement 1n Speed Governors, of which the following is aspecification.

This invention relates to .speed governors for controllable machines ofvarious kinds, such as steam engines, explosive motors, electric motorsor other machines which are driven by an energy supply of any kind.' Theterm motor is used herein to-indicate any such machine. I

The invention relates particularly to a type of speed governors such asillustrated and described in application of Alfred .Vis cher, J r.,'Serial No. 216,057, filed February 8, 1918; having a double control, onecontrol being arranged to quickly change the supply of power producingelement to the motor, and theother being arranged to slowly andcumulatively adjust said supply so as, to accurately adjust the speed tothe-exactrate desired.

This invention is an improvement" upon the double control type ofgovernors. Its object is to provide a construction better adapted thanprior governors of the same. type for regulating motors in which thesecondary or cumulatively adjustable feature is continued in operationover long periods of time.

In the accompanying drawings Fig. 1 is a vertical sectional view of theimproved gov-- ernor; Fig. 2 is a plan view of the same, the top ofthe-casing beingremo-ved, with parts in section on the line 2-2, Fig. 1;Fig. 3 is a horizontal section o'n'the'line 3-3, Fig. 1; and; Fig. 4 isa detail vertical section on the line 44, Fig. 2. i Y

In the drawings 1 indicates a rotatable shaft adapted to be driven inany suitable way from the motor whose speed is to. be controlled. Thisshaft may be mounted in any suitable bearings 2, and is shown pro videdwith a worm wheel 3 driven from a worm gear 4 on a shaft 5 of the motorwhose speed is to be controlled. I 6 indicates gener ally the casingenclosing the governor, and 7 a rocking shaft connected to suitablemeans for regulating the supply. of power producingelement to the motor,such for instance as a throttle valve of a steam or internal combustionengine, a butterfly valve of an internal combustion engine, a regulatorfor an electric motor, or the like. Secured to the shaft 1 within thecase-6 is a member 9 to which are-pivotally'secured two arms10 of asuitable .ceritrifugal governor',its arms being provided at their free.ends with weights 11'. These arms are connected by links-12 to a member18 slidable on the shaft 1 and which is forced to upward p'osition bythe helical spring l i surrounding the shaft interposed between themember 13 and a collar 7 15 threaded to thehub portion of member 9,bymeans of which the tensionof said spring 1d may be varied as is obvious.7

The member 13 is provided'with; a circuit]- ferential channel 16 inwhich engages a roller 17 rotatablymo unted on one end of lever member.18 which is pivota'll-y mounted onv a' stationary fulcrum '19 securedto the V casing" 6. 1 This lever member 18-"isf of the constructionshown in Fig. 3, comprising a sleeve -18 mounted onthe fulcrum member 19and. with a short arm on which the roller 17 is mo'unted'and its longerarm'conne'cted by link 20 toone arm of bell crank'lever 21,

whose other arm is connected by rod 22 to an-arm or crank23 on therocking shaft 7. This lever connection from the member 13 to the shaft17 provides means for quickly ad justingthe power element controlmember, as will-be obvious. To provide for a variation ofthis'controlthe arm of bell crank lever 21 to which the connecting rot-i 22 isattached is provided with a pluralityfof holes 24 located at differentdistances from the fulcrum of the lever 21, to either one-of which holesthe connecting rod may be attached. f

The upper end of memberl?) is provided with a cone face 25 which isengaged by one arm of each of a pair of hell crank levers 26 fulcrumedat27 on" a member 28 which is pinned'or otherwisesuitably secured to shaft1, the otherarmsof 'saidbell crank levers 26 bearing against a' disc 29secured to a hub member 30 splined to, 'but' longitudinally slidable on,shaft 1,- and which hub member on its upper end carries a' similardisc31 These discs-on their facing "sides'are provided with spiralrib's'32', thus forming oppositely facing spirally faced discj' gears.

Interposedibetween these discs so as 'to'be engaged by either onethereof, one at atime, is a toothed gear 38- secured to a shaft 34:mounted in bearings 35 in the walls of the casing 6; This shaft isprovided with a'.

worm gear 37 meshing with a worm wheel 36 on the shaft 38 mounted inbearings 39 in the casing 6 and lying at right angles to shaft 34. Onshaft 38 is a disc 40 provided with an arm 41 on which the bell cranklever 21 is fulcrumed at 42. Disc 40 is provided with a pair of spacedperipheral stop projections 43 adapted to alternately engage with afixed stop 44 projecting inward from the casin 6. The connection betweenshaft 38 and isc 40 is a yielding one, preferably of the friction clutchtype, and as illustrated comprises a second disc 45 secured to the shaft38, an interposed friction member 46 composed of material such as usedfor brake band linings, and a helical spring 47 surrounding shaft 38 andserving to hold the two discs 40 and 45 in frictional engagement. Acollar 48 threaded to shaft 38 serves to vary the tension of spring 37to adjust the degreeof friction between discs 40 and 45.

The operation of the mechanism described is as follows:

Normally the gear 33 is outof mesh with both of the spirally faced gears29 and 31. The shaft 1 is rotated fromthe motor and at a speed varyingwith the variation of the motor speed. When the speed of the motorincreases beyond a predetermined speed, the centrifugalarms 10overcome-the resistance of spring 14 and thus pull downwardly on thelinks 12. This lowers the member 13 and this, through the lever 18, link20, bell crank leverv 21 and connecting rod 22, will quickly shift thepower element'controldevice. A slightly further downward movement ofmember 13 will permit the bell crank levers 26 to shift so as to allowthe member 30 to drop by gravity (or spring.) until the upper spirallyfaced gear 31 meshes with the gear 33, thus setting in rotation theshaft 34 which in turn rotates the disc 40 through the friction clutchmechanism described. This has the effect of shifting the fulcrum 42 ofbell crank lever 21 and cumulatively but slowly further shifting thepower element control device as will be obvious. Should this speedcontinue for a material length of 'timethe disc 40-willbe rotated tosuch an extent that one of the peripheral stops 43 thereonwill contactwiththe fixed stop 44, whereupon thefriction clutch will slip-and therewill be no further movement of the disc 40, and the fulcrum 42will'notbe carried beyond a point where a reverse effect on the powerelement control device will be produced. IVhen the motor speed drops,the spring 14 forces the member 13 upwardly, thus quickly adjusting thepower element control device in reverse direction, through the lever18', connecting link 20, bell crank lever, 21, andconnecting rod 22. Ifthisylowered speed continues, themember 13 rises; still fartherand'thro'ugh its'cone face 25 rocks bell crank levers-26 so as to liftthe member 30 until the lower spirally faced disc 29 is brought intoengagement with the gear 33 on shaft 34, thus rotating disc 40 in theopposite direction, and slowly but cumulatively further shifting thepower ele- 7O ment control device in the opposite direction. Thismovement will continue until the gear 33 is disengaged from disc 29 oruntil the other one of the peripheral stops 43 on disc 40 contacts withthe fixed stop 44, whereupon further shifting of the fulcrum 42 isprevented, the frictional clutch again slipping, as before described. 7r

In some applications of the invention, as, for instance, for controllingautomobile engines, a manual control is necessary inaddition to thegovernor. Under these conditions the governor attempts to overcome thechanges in engine speed due toadjusting the manual control, .and hencethe frictional clutch mechanism hereinbefore described is operatingduring'all of such time. When, however, the engine is not subjected to amanual control, the governor merely has-to take care of su'ch variationsas are due to changes of conditions, such as changes." n load, changesin atmospheric conditions (in the case of internal combustion engines),and the like. Under these circumstances the speed is governed almostentirely by'the quick acting mechanism, the member 30-gen erallyfloating so as to have neitherof the gears 29 or 31 in meshwith gear Themechanism described is reliable n operation, and provides not only arapid but also a very fine and accurate adjustment of the power elementcontrol device givingra quick initial adjustment thereto to quicklyregulate the speed'of the motor, and there after a finer adjustment tobring the motor to the desired speed. It will hold the motor V at asubstantially constant speed within very narrow limits. 7 I

I claim: 7 V

1. In a speed responsive device foroperating the control element of acon'trollablemachine, the combination of a rotating shaft driven from.the motor, a lever element arranged to be quickly displaced byvariations in the shaft speed, a rotatable member on which said levermember is fulcrrimed, 7 means independently operated'by variation in theshaft speed to move said rotatable member, and means for lim ting theextent of movement of said rotatable member-in both directions. a r g V2. In a'sp'eed responsive device for operrating the control element ofarcontrollable machine, the combination of a rotating shaft 7 drivenfrom the motor, a'lever element as 1-25 ranged to' the quickly displacedby variations in the shaft speed, a rotatable member on which said levermember is 'fulcrumed, means independently operated by variation 7 in.the shaft speed -to shift said rotatable member, and means forlimitingtheextent of movement of said rotatable member in bothdirections, the means for operating said rotatable meansincluding ayielding or slip connection arranged to yield when said rotatable memberreaches the limit of its movement in either direction. I i

3. In aspeed responsive device for oper ating the control element of acontrollable machine, the combination of a rotating shaft driven fromthe motor, a centrifugal gover; norithereon, a rotatable shiftablemember connected to the control element of the controllable machine,connections from said governor whereby to quickly displace said controlelement, means independently operated by variation in the shaft speed toslowly displace said shiftable member, and means to limit the extent ofmovement of said shiftable member in both directions.

at. In a speed responsive device for operating the control element of acontrollable machine, the combination of a rotating shaft driven fromthe motor, a centrifugal governor thereon, a rotatable member connectedto the control element of the controllable machine, a connection fromsaid governor whereby to quickly displace said control element, meansindependently operated by variation in the shaft speed to slowlydisplace said rotatable member, and means to limit the extent ofmovement of said rotatable member in both directions, the means forshifting said rotatable member including a yielding or slip connectionarranged to yield when said rotatable member reaches the limit of itsmovement in either direction.

5. In a speed responsive device for operating the control element of acontrollable machine, the combination of a rotating shaft driven fromthe motor, a centrifugal governor thereon, a lever element connected tothe control element of the machine, a rotating member on which saidlever member is fulcrumed, means actuated by said governor for quicklydisplacing said lever element, and means independently operated byvariation in the shaft speed to slowly actuate said rotatable member.

6. In a speed responsive device for operating the control element of acontrollable machine, the combination of a rotatingshaft driven from themotor, a centrifugal governor thereon, a lever element connected to thecontrol element of the machine, a rotating member to which said levermember is operatively connected, means actuated by said governor forquickly displacing said lever element, means independently operated byvariation in the shaft speed to slowly rotate said rotatable member, andmeans to limit the extent of movement of the rotatable member in bothdirections.

7. In a speed responsive device for operating the control element of acontrollable- I ment.

machine, the combination of a rotating shaft driven from the motor,acentrifugal governor thereon, a lever'element connected to the controlelement of the machine, a'rotating member to which said lever member isoperative ly connected, means actuated by said governor for q ickldisplacing said lever element, means independently operated by variationin the shaft speed to slowly rotate said rotatable member, and means tolimit the extent of movement of the rotatable member in both directions,the means for rotating [said rotatable member including a'yielding orslip connection arranged to yield whenlsaid rotatable member reaches thelimit of its movement in eitherdirection.

y 8. Ina speed responsive "device" for operating the control'element ofa'controllable machine, thecombination of a' rotating shaft driven fromthe motor, a rotatable member operatively connected to the machinecontrol element, reversely arranged gears on said shaft, an interposedgear arranged for connection to either one of said reversely arrangedgears and operatively connected to said rotatable'element, a centrifugalgovernor on said shaft, means actuated by said governor to bring eitherof said reversely arranged gears into operative connection with theinterposed gear, and independent connections from said governor to themachine control element for quickly displacing' the same. i

9. In a speed responsive device for operating the control element of acontrollable machine,the combination of a rotating shaft driven from themotor, a rotatable member operativelyconnected to the machine controlelement, reversely arranged gears slide able onv said'shaft, aninterposed gear adapted'to engage either one of said re versely arrangedgears and operatively connected to said rotatable element to slowlyrotate the same, a centrifugal governor on said shaft, means actuated bysaid governor to bring either of saidreversely arranged gears intoengagementwith the interposed gear, and independent connections from thesaid governor to the machine control element to quickly move the same.

10. In a speed responsive device for operating thecontrol element of acontrollable machine, the combination of a rotating-shaft driven fromthe motor, a' shiftable member operatively connected to the machinecontrol element, a pair of spa'ced disks slidably mounted on said shaft,an interposed element arranged to be actuated by either of said disksand operatively connected with said shiftable member, a centrifugalgovernor on said shaft, a cam sleeve on said shaft interposed betweensaid governor and said disks, and independent connections from saidgovernor to the .said control ele- 11. In a speed responsive device foroperating thecontrol element of a controllable machine, the combinationof a rotating shaft driven from the motor, a shiftable memberoperatively connected to the machine control element, a pair of spaceddisks slidably mounted on said shaft, an interposed element arranged tobe actuated by either of said disks and operatively connected with saidshiftable member, the operative connection including a friction clutcharranged to yield when said shiftable member reaches the limit of itsmovement in either direction, a centrifugal governor on said shaft, acam sleeve on said shaft interposed between said governor and saiddisks, and independent connections from said governor to the saidcontrol element.

12. Ina speed responsive device for 0p- SAMUEL M. KINTNER.

l/Vitnesses G. G. TRILL, HOWARD L. SNIVELY..

